The default is 0.
*udp_mode*, a ``dns.query.UDPMode``, determines how UDP is used
- for IXFRs. The default is ``dns.UDPMode.NEVER``, i.e. only use
- TCP. Other possibilities are ``dns.UDPMode.TRY_FIRST``, which
+ for IXFRs. The default is ``dns.query.UDPMode.NEVER``, i.e. only use
+ TCP. Other possibilities are ``dns.query.UDPMode.TRY_FIRST``, which
means "try UDP but fallback to TCP if needed", and
- ``dns.UDPMode.ONLY``, which means "try UDP and raise
+ ``dns.query.UDPMode.ONLY``, which means "try UDP and raise
``dns.xfr.UseTCP`` if it does not succeed.
Raises on errors.